"Sun, 15 Dec 2024 12:21:31"
Convert date and time to unixtime.
Another datetime format string at UTC
YYYYMMDD
20241215
Only TIME
12:21:31
General datetime
2024-12-15 12:21:31Z
For Database
2024-12-15 12:21:31
For HTTP1.1
Sun, 15 Dec 2024 12:21:31 GMT